2 or 4 bbl carb setup?
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From: Williamson, NY
2 or 4 bbl carb setup?
I am building a nearly stock 1977 302 engine using a stock crank, 0.030" oversized flat top pistons, stock cam, 1990 E7TE heads. I am debating whether to stick with the stock 2-bbl intake and carb or go after a after market 4bbl intake and 650 carb. I am not trying to build a race engine, but I would like good performance and fuel economy. What do you folks think? Thanks.
Jim
Jim
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Well since my exhaust system needs to be replaced and the stock exhaust pipes are insanely exspensive I have decided to buy an exhaust system from Summit for less than the cost of the stock x-over pipe. Since my current two bbl carb choke set up is actuated by exhaust gases from a port on the stock exhaust manifold, I have decided to go for after market intake and 4bbl w/ electronic choke. I purchased a Weiand model 8011 Aluminum intake and a Holley 600cfm carb w/ Vacuum secondaries and an electronic choke setup that I believe will work quite well with my application. It is funny how one thing seems to lead to another.
Jim
Jim
Last edited by cujo8; Apr 10, 2006 at 05:54 AM.
Laughing Gas
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From: In the woods of Oregon
I think with a fairly stock set up your 2V manifold and carb will give you the same mileage as a 4V would. You will lose a little power with the 2V, but you have it now and you can always upgrade later.
I have a article on building 302s and it says stock manifold and rejeted carb for a cam upto 204/214 .050 duration. Also says stock manifolds with pipes no larger than 2" max for a dual exhaust. This info was gleaned from many different 302 builds and dyno tests. The headers and manifold are good upgrades but only if you have a cam to take advantage of there ability to flow. If you staying nearly stock, stay nearly stock.
My 2 cents.
I have a article on building 302s and it says stock manifold and rejeted carb for a cam upto 204/214 .050 duration. Also says stock manifolds with pipes no larger than 2" max for a dual exhaust. This info was gleaned from many different 302 builds and dyno tests. The headers and manifold are good upgrades but only if you have a cam to take advantage of there ability to flow. If you staying nearly stock, stay nearly stock.
My 2 cents.
Last edited by kopfenjager; Apr 10, 2006 at 01:46 PM. Reason: typos
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From: Williamson, NY
Well I have decided against staying completely stock. I purchased a Weiand model 8011 Aluminum intake, Holley 600cfm carb w/ Vacuum secondaries, 1990 E7TE cylinder heads so far. I plan on purchasing headers and installing dual exhaust, so I am also planning to purchase a better cam as well to complete the package. I will also be boring out my cylinders out 0.030" and installing 0.030" oversized flat top pistons. Anyone know the volume of the E7TE heads so I can calculate me compression ratio?
Thanks.
Jim
Thanks.
Jim
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